Sky is darkening.
Meaning: This means that the sky is becoming dark or losing light, which often indicates that it will soon rain. It's like saying, The sky is getting darker.
Choice of Words: Sky is the space above the earth that is filled with air, clouds, and other elements. Is is a form of the verb 'to be' that connects the subject to the predicate. Darkening means that it is becoming dark or losing light. When put together, 'Sky is darkening' means that the sky is becoming dark or losing light.
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Related Expressions